Hi Folks,(adsbygoogle = window.adsbygoogle || []).push({});

I got stuck towards the end where it ask to derive the unit normal (eqn 3.2.29 I don't know how they arrived at [tex]n_x[/tex]. I have looked at trig identities....and I have assumed the following

[tex]n_x=\frac{N_x}{|N_x|}[/tex]

I dont see the (r+p) term anywhere in neither the top nor bottom.

PS: I have posted this in MHB on Tues but no response.

http://mathhelpboards.com/calculus-10/unit-normal-epicycloid-16922.html

Thanks

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# Unit Normal for Epicycloid

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